13131171443 has 4 divisors (see below), whose sum is σ = 14141261568. Its totient is φ = 12121081320.

The previous prime is 13131171439. The next prime is 13131171457. The reversal of 13131171443 is 34417113131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13131171443 - 2² = 13131171439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13131171413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505045043 + ... + 505045068.

It is an arithmetic number, because the mean of its divisors is an integer number (3535315392).

Almost surely, 2^13131171443 is an apocalyptic number.

13131171443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13131171443 is a deficient number, since it is larger than the sum of its proper divisors (1010090125).

13131171443 is a wasteful number, since it uses less digits than its factorization.

13131171443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010090124.

The product of its digits is 3024, while the sum is 29.

Adding to 13131171443 its reverse (34417113131), we get a palindrome (47548284574).

The spelling of 13131171443 in words is "thirteen billion, one hundred thirty-one million, one hundred seventy-one thousand, four hundred forty-three".